八年级第二学月考试题

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北师大版2021-2022学年八年级数学下册第二次月考测试题(附答案) (2)

北师大版2021-2022学年八年级数学下册第二次月考测试题(附答案) (2)

2021-2022学年八年级数学下册第二次月考测试题(附答案)一、选择题(共30分)1.把a2﹣a分解因式,正确的是()A.a(a﹣1)B.a(a+1)C.a(a2﹣1)D.a(1﹣a)2.如图,数轴上所表示的不等式的解集是()A.x≥2B.x>2C.x<2D.x≤23.下列图形中,既是轴对称图形又是中心对称图形的是()A.B.C.D.4.如图,在已知的△ABC中,按以下步骤作图:①分别以B,C为圆心,以大于BC的长为半径作弧,两弧相交于两点M,N;②作直线MN交AB于点D,连接CD,若CD=AC,∠B=25°,则∠ACB的度数为()A.105°B.100°C.95°D.90°5.要使分式有意义,则x的取值范围是()A.x=1B.x≠1C.x=﹣1D.x≠﹣16.如图,在▱ABCD中,将△ADC沿AC折叠后,点D恰好落在DC的延长线上的点E处.若∠B=60°,AB=3,则△ADE的周长为()A.12B.15C.18D.217.若(a+3)x>a+3的解集为x<1,则a必须满足()A.a<0B.a>﹣3C.a<﹣3D.a>38.如图,把一块三角板ABC的直角顶点B放在直线EF上,∠C=30°,AC∥EF,则∠1=()A.30°B.45°C.60°D.75°9.如图,一次函数y1=x+b与一次函数y2=kx+3的图象交于点P(1,2),则关于不等式x+b>kx+3的解集是()A.x>0B.x>1C.x<1D.x<010.如图,在△ABC中,AB=AC,分别以点A、B为圆心,以适当的长为半径作弧,两弧分别交于E,F,作直线EF,D为BC的中点,M为直线EF上任意一点.若BC=4,△ABC面积为10,则BM+MD长度的最小值为()A.B.3C.4D.5二、填空题(共24分)11.分解因式:ab2﹣9a=.12.若一个多边形的每一个内角都是150°,则它是边形.13.如图所示,△DEF是由△ABC通过平移得到的,且点B,E,C,F在同一条直线上,若BF=14,EC=8,则从△ABC到△DEF的平移距离为.14.若分式有意义,则x的取值范围为.15.平行四边形ABCD中,E、F是对角线BD上不同的两点,写出一个能使四边形AECF 一定为平行四边形的条件.(用题目中的已知字母表示)16.如图,∠AOB=120°,点P为∠AOB的平分线上的一个定点,且∠MPN与∠AOB互补,若∠MPN在绕点P旋转的过程中,其两边分别与OA、OB相交于M、N两点,则以下结论:①PM=PN;②OM+ON=OP;③四边形PMON的面积保持不变;④△PMN的周长保持不变.其中说法正确的是(填序号).三、计算题(共18分)17.解方程:.18.解不等式组并把解集在数轴上表示出来.19.先化简:,再选一个你喜欢的a的值代入求值.四、解答题(共48分)20.如图,△ABC三个顶点的坐标分别为A(2,4),B(1,1),C(4,3).(1)请画出△ABC关于原点对称的△A1B1C1;(2)请画出△ABC绕点B逆时针旋转90°后的△A2B2C2,并写出A2的坐标.21.如图,在等边△ABC中,AB=6,D是AC的中点,E是BC延长线上的一点,CE=CD,DF⊥BE,垂足为F.(1)求BD的长;(2)求证:BF=EF.22.如图:在Rt△ABC中,∠A=90°,过B作BH∥AC.(1)按尺规作图要求作BC的垂直平分线,交AC于E,交BH于D,(保留作图痕迹,不写作法),连接BE、CD.(2)求证:四边形BECD是平行四边形.23.为了做好防疫工作,学校准备购进一批消毒液.已知每瓶B型消毒液比A型贵2元,用56元购A型消毒液与72元购B型消毒液的瓶数相同.(1)这两种消毒液的单价各是多少元?(2)学校准备购进这两种消毒液共90瓶,且B型消毒液的数量不少于A型消毒液数量的,请设计出最省钱的购买方案,并求出最少费用.24.如图,在▱ABCD中,对角线AC,BD相交于点O,BD=2AD,点E在线段OC上,且OE=CE.(1)求证:∠OBE=∠ADO;(2)若F,G分别是OD,AB的中点,且BC=10,①求证:△EFG是等腰三角形;②当EF⊥EG时,求▱ABCD的面积.25.如图,在平面直角坐标系xOy中,已知点A(5,1),B(1,1),C(0,5).直线m平行于x轴且经过C,D,E三点.直线l的关系式为y=﹣2x+b.(1)若△ABD是以AB为底的等腰三角形,且直线l过点D,求b的值;(2)若b=9,直线l与▱ABDE的边DE相交时,求点E的横坐标n的取值范围;(3)若点F为▱ABDE的对角线BE与DA的交点,当直线l经过点F时,求点D的横坐标q与b之间的函数关系式.参考答案与试题解析一、选择题(共30分)1.解:a2﹣a=a(a﹣1).故选:A.2.解:∵2处是实心圆点且折线向右,∴不等式的解集是x≥2.故选:A.3.解:A.该图形既不是轴对称图形,又不是中心对称图形,故此选项不合题意;B.该图形既不是轴对称图形,又不是中心对称图形,故此选项不合题意;C.该图形是轴对称图形,不是中心对称图形,故此选项不合题意;D.该图形既是轴对称图形,又是中心对称图形,故此选项符合题意.故选:D.4.解:由题意可得:MN垂直平分BC,则DC=BD,故∠DCB=∠DBC=25°,则∠CDA=25°+25°=50°,∵CD=AC,∴∠A=∠CDA=50°,∴∠ACB=180°﹣50°﹣25°=105°.故选:A.5.解:∵分式有意义,∴x﹣1≠0.解得;x≠1.故选:B.6.解:由折叠可得,∠ACD=∠ACE=90°,∴∠BAC=90°,又∵∠B=60°,∴∠ACB=30°,∴BC=2AB=6,由折叠可得,∠E=∠D=∠B=60°,∴∠DAE=60°,∴△ADE是等边三角形,∴△ADE的周长为6×3=18,故选:C.7.解:∵(a+3)x>a+3的解集为x<1,∴a+3<0,解得:a<﹣3.故选:C.8.解:∵AC∥EF,∠C=30°,∴∠C=∠CBF=30°,∵∠ABC=90°,∴∠1=180°﹣∠ABC﹣∠CBF=180°﹣90°﹣30°=60°,故选:C.9.解:当x>1时,x+b>kx+3,即不等式x+b>kx+3的解集为x>1.故选:B.10.解:由作法得EF垂直平分AB,∴MB=MA,∴BM+MD=MA+MD,连接MA、DA,如图,∵MA+MD≥AD(当且仅当M点在AD上时取等号),∴MA+MD的最小值为AD,∵AB=AC,D点为BC的中点,∴AD⊥BC,∵S△ABC=•BC•AD=10,∴AD==5,∴BM+MD长度的最小值为5.二、填空题(共24分)11.解:原式=a(b2﹣9)=a(b+3)(b﹣3),故答案为:a(b+3)(b﹣3).12.解:360÷30=12,则它是12边形.13.解:∵△DEF是由△ABC通过平移得到,∴BE=CF,∴BE=BF﹣EC,∵BF=14,EC=8,∴BE=14﹣8=3.故答案为:3.14.解:∵分式有意义,∴x2﹣4≠0,∴x≠±2.故答案为:x≠±2.15.解:连接AC交BD于点O,如图:在平行四边形ABCD中,OA=OC,OB=OD,∵AE∥CF,∴∠OAE=∠OCF,∵∠AOE=∠COF,AO=CO,∴△AOE≌COF(ASA),∴OE=OF,∴四边形AECF为平行四边形;故答案为:AE∥CF.16.解:过点P作PE⊥OA,垂足为E,过点P作PF⊥OB,垂足为F,∴∠PEO=90°,∠PFO=90°,∵∠AOB=120°,∴∠EPF=360°﹣∠AOB﹣∠PEO﹣∠PFO=60°,∵∠MPN+∠AOB=180°,∴∠MPN=180°﹣∠AOB=60°,∴∠MPN﹣∠EPN=∠EPF﹣∠EPN,∴∠MPE=∠NPF,∵OP平分∠AOB,PE⊥OA,PF⊥OB,∴PE=PF,∵∠MEP=∠NFP=90°,∴△MEP≌△NFP(ASA),∴PM=PN,ME=NF,故①正确;∵OP=OP,∴Rt△PEO≌Rt△PFO(HL),∴OE=OF,∴OM+ON=OE+ME+OF﹣NF=2OE,∵OP平分∠AOB,∴∠EOP=∠AOB=60°,∴∠EPO=90°﹣∠EOP=30°,∴PO=2OE,∴OM+ON=OP,故②正确;∵△MEP≌△NFP,∴四边形PMON的面积=四边形PEOF的面积,∴四边形PMON的面积保持不变,故③正确;∵PM=PN,∠MPN=60°,∴△PMN是等边三角形,∵MN的长度是变化的,∴△PMN的周长是变化的,故④错误;所以,说法正确的是:①②③,故答案为:①②③.三、计算题(共18分)17.解:方程两边同乘以(x+1)(x﹣1)得(x+1)2﹣6=(x+1)(x﹣1)(2分)整理,得2x=4x=2(4分)检验,把x=2代入(x+1)(x﹣1)=3≠0.所以,原方程的根是x=2.(5分)18.解:解不等式x+4≤3(x+2),得:x≥﹣1,解不等式3x﹣3<2x,得:x<3,则不等式组的解集为﹣1≤x<3,将不等式的解集表示在数轴上如下:19.解:原式=[﹣]•=•=•=,当a=﹣1时,原式=﹣1.四、解答题(共48分)20.解:(1)如图,△A1B1C1;即为所求;(2)如图,△A2B2C2即为所求,A2的坐标(﹣2,2).21.(1)解:∵△ABC是等边三角形,∴∠BCD=60°,AB=BC=AC=6,又∵AB=6,点D为AC的中点,∴CD=3,BC⊥CD,∴BD===3;(2)证明:∵△ABC是等边三角形,D为AC的中点,∴∠CBD=,又∵CE=CD,∴∠CDE=∠E,又∵∠BCD=60°,∴∠E=,∴∠CBD=∠E,∴BD=DE,又∵DF⊥BC,垂足为F.∴BF=EF.22.(1)解:如图,直线DE为所求;(2)证明:DE交BC于F,如图,∵DE垂直平分BC,∴BF=CF,EB=EC,又∵BH∥AC,∴∠1=∠2,∠3=∠4在△BDF和△CEF中,,∴△BDF≌△CEF(AAS),∴BD=CE,∵BD∥CE,∴四边形BECD是平行四边形.23.解:(1)设A型消毒液的单价是x元,B型消毒液的单价是y元,得,解得.答:A型消毒液的单价是7元;B型消毒液的单价是9元.(2)设购进A型消毒液a瓶,则购进B型消毒液(90﹣a)瓶,费用为w元,依题意可得:w=7a+9(90﹣a)=﹣2a+810,∵k=﹣2<0,∴w随a的增大而减小.∵B型消毒液的数量不少于A型消毒液数量的,∴90﹣a≥a.解得a≤67 ,∴当a=67时,w取得最小值,此时w=﹣2×67+810=676,90﹣a=23.答:最省钱的购买方案是购进A型消毒液67瓶,购进B型消毒液23瓶;最低费用为676元.24.(1)证明:∵四边形ABCD是平行四边形,∴AD∥BC,AD=BC,DO=BO=BD,∴∠ADB=∠DBC,∵BD=2AD,∴AD=DO,∴BC=BO,∵E是CO中点,∴∠OBE=∠OBC,∴∠OBE=∠ADO;(2)①证明:∵BC=BO,∴△BOC是等腰三角形,∵E是CO中点,∴EB⊥CO,∴∠BEA=90°,∵G为AB中点,∴EG=AB,∵四边形ABCD是平行四边形,∴AB=CD,∵E、F分别是OC、OD的中点,∴EF=CD∴EG=EF,∴△EFG是等腰三角形;②解:由①得EF∥AB,∵EF⊥EG,∴EG⊥AB,∵G是AB的中点,∴AE=BE,设CE=x,则AO=CO=2CE=2x,∴BE=AE=3x,在Rt△BEC中,BC=10,∴EC2+BE2=BC2,即x2+(3x)2=102,解得x=,∴AC=,BE=,∴S▱ABCD=2S△ABC=.25.解:(1)∵A(5,1),B(1,1),DA=DB,∴D(3,5),将x=3,y=5代入y=﹣2x+b,∴b=11;(2)∵四边形ABDE为平行四边形,∴DE=AB=4,∵E(n,5),∴D(n﹣4,5),当5=﹣2x+9时,x=2,∵直线y=﹣2x+9与边DE有交点,∴2≤n≤6;(3)∵四边形ABDE为平行四边形,∴DF=F A,∵D(q,5),A(5,1),∴,即,将,y=3代入y=﹣2x+b,∴q=b﹣8.。

2023~2024学年度第二学期第二次月考试题八年级物理(下)

2023~2024学年度第二学期第二次月考试题八年级物理(下)

2023~2024学年度第二学期第二次月考试题八年级物理(下)一、单选题(共40 分)1. 下列物体重约为1N的是()A.一支铅笔B.一根香蕉C.一瓶矿泉水D.一桶食用油2. 在下列说法中,正确的是()A.船桨是费力杠杆B.物体运动速度越大其惯性越大C.运输机起落架装有宽大的轮子是为了减小对地面的压力D.运动的物体不受力时,运动的速度会减小,最终会停下来3. 目前,我国“天宫”空间站已实现航天员长期驻留,航天员在空间站中可以实施的是()A.用托盘天平测物体质量B.用哑铃锻炼手臂肌肉C.用弹簧测力计测量物体重力D.用弹簧拉力器健身4. 如图所示,一个装有水的平底密闭矿泉水瓶,先正立放置在水平桌面上,再倒立放置。

两次放置时,瓶对桌面的压力分别为F甲和F乙,瓶对桌面的压强分别为p甲和p乙,则()A.F甲>F乙B.p甲>p乙C.F甲<F乙D.p甲<p乙5. 如图所示,O为轻质杠杆AB的支点,B点挂一重物G,若在B点施加F1、或在A点分别施加F2、F3、F4四个力后,杠杆均保持水平位置平衡,则这四个力中最小的力是()A.F1B.F2C.F3D.F46. 把体积相同、质量不同的三个小球A、B、C放入同种液体中,静止后的位置如图所示,它们所受的浮力分别为F A、F B、F C,则这三力大小关系正确的是()A.F A>F B>F CB.F A=F B=F CC.F A<F B<F CD.F A<F B=F C7. 关于下面四幅图的说法中错误的是()A.图甲所示托里拆利实验中,将竖直玻璃管倾斜,水银柱的高度不变B.图乙所示排水管U形“反水弯”是一个连通器C.图丙所示在B管吹气,A管中水而上升,是因为流体中流速越大的位置压强越大D.图丁所示把这自制气压计从山下移到山顶,细管内的水柱上升8. 下列说法中正确的是()A.做功越多的机械,功率一定越大B.功率越大的机械,机械效率越大C.功率越大的机械,所用时间越少D.功率越大的机械,做功一定越快9. 如图所示,小黄家里悬挂着的吊灯处于静止状态,以下说法正确的是()A.天花板对绳子的拉力与绳子对灯的拉力是一对平衡力B.绳子对灯的拉力与灯受到的重力是一对平衡力C.天花板对绳子的拉力与灯受到的重力是一对平衡力D.吊灯对绳子的拉力与绳子对吊灯的拉力是一对平衡力10. 如图所示,细线上端固定,下端拉着小球在竖直平面内摆动,A、B是球摆动过程中的最高点,C是最低点,当小球到达C点时,所受的力全部消失,则小球将()A.一定处于静止状态B.一定做匀速直线运动C.可能处于静止状态可能做匀速直线运动D.可能加速运动二、填空题(共32 分)11. 如图甲所示,工人师傅实际上是因陋就简制成了一个简单的工具,这是利用了重力的方向总是___________的知识;如图乙所示,在A、B、C三点用扳手拧螺母,更省力的是___________点,这说明力的作用效果跟它的___________有关。

八年级物理第二次月考试题

八年级物理第二次月考试题

八年级物理第二次月考试题1、选择题(每题2分)1、小纸片会在发声的扬声器的纸盒上跳动,发声的音叉接触水面时会激起水花,风吹树叶哗哗响,树叶在振动。

这些现象说明了()A.声音是由物体振动产生的 B.声音能在水中传播C.声音的传播需要介质 D.声音能在空气中传播2、、右图是探究声现象的实验装置,下列现象中不正确的是()A.音叉振动时,乒乓球被弹开B.听到的声音越大,乒乓球被弹得越远C.敲音叉的力越大,听到的音调就越高D.音叉发出的声音是由空气传播到人耳的3、下列有关声现象的说法正确的是()A.“震耳欲聋”说明声音的音调高B.校园内植树可减弱校外传来的噪声C.超声波的频率很低,所以人听不到 D.真空可以传声4、成语“立竿见影”中“影”的形成是由于()A.光的折射 B.光的直线传播C.光的反射 D.光的色散5、某同学走向平面镜时,他在镜中像的大小及像与人间的距离将()A.像变大,人和像间的距离变大B.像变大,人和像的距离变小C.像大小不变,人和像间的距离不变D.像大小不变,人和像间的距离变小6、使用下列光学器材,其目的是使物体成倒立缩小实像的是 ( )A.放大镜 B.照相机 C.幻灯机 D.投影仪7、下列光现象中,由于光的折射而形成的是 ( )8、、在太阳光下我们能看到红色的花是因为()A.花发出的光是红色的 B.花能反射太阳光中的红色光C.花发出的光是白色的 D.花能吸收太阳光中的红色光9、、关于紫外线的主要作用,下列说法中不正确的是()A.有助于人体合成维生素D B.能杀死微生物C.能使荧光物质发光 D.能用来加热物体10、下面图中,哪一幅图正确表示了光从空气进入水的光路()11、彩色电视机显现出的各种颜色都是由三种色光混合而成的,这三种色光是()A..红、绿、黄、 B 红、绿、蓝C.红、绿、紫D.红、黄、绿12、下列关于光现象的说法中,正确的是()A.“坐井观天,所见甚小”是光直线传播的结果B.验钞机是利用红外线使钞票上的荧光物质发光从而辨别钞票的真伪的C.光与镜面成30°角射到平面镜上时,其反射角为30°D.筷子斜插入装满水的碗中,我们可以观察到筷子在水中的部分会向下偏折13、用竹笛和小提琴同时演奏同一支乐曲,但人们一听声音就能区别出来是由哪一种乐器所奏,这是因为它们发出的()A、响度不同B、音调不同C、音色不同D、离听众的距离不同14、“高声呼叫”和“低声细语”,这里的“高”和“低”指的是()A、音色的好坏B、音调的高低C、响度的大小D、以上说法都可以15、下面是对凸透镜成像的说法,其中正确的是:( )A.凸透镜只能成实像 B.凸透镜只能成虚像C.凸透镜只能成放大的像 D.凸透镜既能成实像,又能成虚像16、下列现象中,属于凸透镜成像的是()A.平静的水面映出岸上树木的倒影 B.在岸边看到水中游动的鱼C.潜水员在水下看到水面上方的景物 D.利用放大镜观察的物体很清晰17、下列与光有关的说法正确的是()A、光发生漫反射时,不遵守光的反射定律B、光从空气射入水中,传播速度不变C、月食是因为光的反射而形成的D、凸透镜对光有会聚作用18、要使小灯泡发出的光变成平行光,应把小灯泡放在凸透镜主光轴上的()A、焦点之内B、焦点上C、一倍焦距以外二倍焦距以内 D 、二倍焦距以外19、物体通过凸透镜在光屏上成一实像,如果用黑纸将凸透镜下半部分遮住,则光屏上()A 不能成像B 只能成一半像C 仍成原来的像,但亮度比原来暗D 需移动光屏到适当位置,才能重新得到像20、如图所示,是第一套2010年上海世博会特种邮票.用焦距为15厘米的凸透镜观察这张邮票上较小的图案,则邮票到透镜的距离应()A、大于15厘米B、大于30厘米C、小于15厘米D、小于30厘米21、把凸透镜对准太阳光,可在距离凸透镜10cm处得到一个最小最亮的光斑,若将一个物体放在此凸透镜的主光轴上距离透镜30cm处,则透镜的另一侧可以得到一个A.倒立放大的实像 B.倒立缩小的实像C.正立放大的虚像 D.正立缩小的虚像22、小明在探究凸透镜成像规律时,保持凸透镜的位置不变,先后把蜡烛放在a、b、c、d四点并分别调整光屏的位置,如图2所示,探究后他总结出下列说法。

新目标八年级下学期英语第二次月考试题及答案

新目标八年级下学期英语第二次月考试题及答案

八年级下学期英语第二次月考试题一.单项选择(20分)()1. They ______money to build a new school for the faraway village.A.collectedB.tookC.spent D raised()2. He said he _____ doing some shopping.A.would likeB.likedC.wanted D felt()3. ----When did you get the gift? ---- _____ my _____ birthday.A. On, sixthB. In, sixthC. On, sixD. In, six()4. We had to stop to have a rest,____ we were very tired.A.whileB.whenC.whether D because()5. -_____you _____ to New York?-No,but I will go there next year.A.Have,goneB.Do,goC.Will,go D Have,been()6. People are _____ in ______ places.A.interested, interestedB.interesting, interestingC.interested, interestingD.interesting, interested()7. The student_____ No.1 Middle School won the match.A.fromB.inC.atD.of()8. Wen Li has_____ kites for two years.A.been makeB.makingC.been makingD.been made()9. Li Chen _____football an hour ago.A.has been playingB.has playedC.playsD.played()10.-____you_____the film yet? -Yes. I____it last SaturdayA.Will,see;sawB.Did,see;sawC.Have,seen;have seenD.Have,seen;saw()11.“Harry Potter”is a very nice film. I____ it twice.A.will seeB.have seenC.sawD.see()12. ---Do you mind if I open the window? ------__________.A. No, not at allB. Sorry, I’ll do it right awayC. Yes, pleaseD. I’ll be glad to()13. Why not _____ help when you were in trouble?A. you ask forB. ask forC. asking forD. asked for()14. He got really ____ while hearing the bad news.A. angrilyB. angryC. happyD. happily()15. Dogs are too difficult to _______.A. take careB. look forC. give awayD. take care of()16. I have an _____ grandmother.A. 80 year oldB. 80-year-oldC. 80 years oldD. 80-years-old ()17.Tomorrow is Sunday. How about ______ to visit your grandmother?A. goB. goingC. to goD. gone()18. What’s the best gift you ____ ever ____?A. have; receiveB. did; receiveC. have; receivedD. /; receive()19. One of the ____ polite ways ask someone is “Would you mind…?”A .much B. more C. many D. most()20.I go back until the storeA. won't; closesB. will; closesC. don't; will closeD. would; closed二.完形填空(20分)Ted sat next to me when we were in elementary school. He had 1 problems in communicating(交流)with people. One always had to 2 what he was saying. Besides, most of my classmates did not like to be with him 3 his hands and shirts were always 4 .I tried to let him know the 5 of being clean by telling him several times a day to wash his hands. But he didn't want to 6One day, our teacher Miss White walked up to Ted. Without saying 7 ,she took Ted to the washroom. Slowly,Miss White washed his hands and told him that he should 8 himself clean. She did that every day for one month. Finally,Ted understood.Miss White's love has given me a good 9 to follow when I'm doing my job.I always remember to teach my students by showing them the right ways to do things. And most important of all,I 10 remember to give them more time to learn and to grow up.()1. A. great B. important C. necessary D. serious()2. A. repeat B. know C. guess D. so()3. A. if B. because C. why D. so()4. A. old B. dirty C. new D. clean()5. A. importance B. why C. time D. place()6. A. listen B. think C. understand D. hear()7. A. everything B. nothing C. something D. anything ()8. A. get B. have C. keep D. make()9. A. lesson B. example C. advice D. book()10. A. often B. usually C. always D. sometime三.阅读理解(20分)AOne of my friends Fred did very 1ittle work when he was a student. He spent more time drinking in bars than working in the library. Once, we had to take an important exam. The exam had a hundred questions. To each question, we had to write "Right" or "Wrong". The night before the exam, Fred was watching TV and drinking. He usua1ly worried a lot the night before the exam. But on that night he looked quite relaxed. He told me what he would do." It's very easy," he said to me, "There are a hundred questions and I have to get fifty right answers to pass the exam. I'll bring a coin with me and throw it to decide answers. I' m sure I'll get half the questions right in this way." During the exam, Fred sat down and really threw the coin for half an hour when he was writing down his answers. Then he 1eft half anhour before the others. The next day he saw the teacher on the playground. "Good morning, Mr. Wu," he said, "Have you checked the papers? Have I passed?" The teacher 1ooked at him and smiled, "Ah, it's you, Fred. One moment, please." Then he put his hand into his pocket and took out a coin. He threw it into the air, caught it in his hand and looked at it , "I'm very sorry, Fred. You failed."( )1. Fred usually worried a lot before the exam _______________.A. because he did little work in the bars.B. because he did little work on his booksC. he was afraid of the examD. he didn't like taking the exam.( )2. ____________________,the night before the important exam.A. Fred was busy working on his lessonsB. Both Fred and the writer were preparing the lessonsC. Fred worried about the examD. Fred was watching TV and drinking.( ) 3. On that night before the important the exam, Fred was very quiet because _______ .A. he knew the answerB. the exam would be very easyC. the teacher would give him good gradesD. he would choose the answers by chance( ) 4. Which sentence is true?A. The coin didn't bring good luck to Fred.B. The coin brought Fred good luck.C. Fred was a very good student.D. Fred was a very clever student.( )5. Which sentence is wrong?A. The teacher didn't know what Fred did in the examB. Mr. Wu didn't let Fred pass the examC. Mr. Wu was glad that Fred was very clever.D. The next day the teacher looked at Fred and smiled.BOne day Mrs Wilson went shopping with Tracy and Ben. They went to the supermarket in the new shopping centre."Why do you buy things here?" Tracy wanted to know. “Because they are cheaper here than at the corner store near our home.” Mrs Wilson said,“Help me check the prices, please.”The Wilsons were not rich and Mrs Wilson was always careful with her money. She looked carefully at the prices of things. She bought lots of things in the supermarket. When they got home,the children said,"We don't think you saved money by going to the supermarket.”“Of course I did.” Mrs Wilson said. “Everything was cheaper there.”"We know,"the children said,"but we came home by taxi because we had too much to carry. The taxi fare was more than the money you saved!”Mrs Wilson added something up. Her children were right."Well done,”she said. "Next time we'll do the shopping nearby.”()1 .The things at the corner store were_than those in the supermarket.A. cheaperB. niceC. more expensiveD. better()2. Mrs Wilson in the end.A. spent more moneyB. paid less moneyC. lost some moneyD. saved a little money()3. From the passage we know the children were_.A. happyB. cleverC. tiredD. lazy()4. Mrs Wilson will next time.A. never call a taxiB. go on buying things in the supermarketC. buy things near her homeD. not go shopping with her children()5. The best title for the passage isA. Cutting priceB. Corner storeC. SupermarketD. Shopping八年级下册第二次月考答案一.1-5 DBADD 6-10 CACDD11-15 BABBD16-20 BBCD A二.1-5 DABBA 6-10 ADCBC三.1-5 BDDAC 6-10 CABCD。

—学年第一学期海南省海景学校八年级语文科第二次月考试题(含答案)

—学年第一学期海南省海景学校八年级语文科第二次月考试题(含答案)

2020—2021学年度第一学期海景学校八年级语文科月考(二)检测题(时间:120分钟满分:100分命题人:)班级:姓名:座号:得分:一、积累与运用(本题共7题,共16分)1.书法是中华民族的艺术瑰宝,请欣赏下面的书法作品,按要求答题。

(4分)(1)关于这幅书法作品的字体,下列选项中正确的一项是()(2分)A.甲骨文B.篆书C.隶书D.行书(2)请用简体楷书规范工整地写在下面的格子里。

(2分)2.下列加点字注音全对的一项是()(2分)A.溃.退(kuì)锐不可当.(dāng)歼.灭(qiān)祭我国殇.(shāng)B.镌.刻(juān)翘.首而望(qiào)仲.裁(zhōng)深恶.痛疾(è)C.诘.责(jí)互相轩邈.(miǎo)曦.月(xī)孀.妻遗男(shuāng)D.匿.名(nì)林寒涧.肃(jiàn)横柯.(kē)法家拂.士(bì)3.下列词语,错别字个数最少的一项是()(2分)A.踱步度过难关诚惶诚恐张慌失措B.气慨慷慨成词和颜悦色查言观色C.禁固油光可签广茂无垠查无音信D.桅杆歌声缭亮漫不经心震耳欲聋4.下列句子中加点成语使用正确...的一项是()(2分)A.大家要牢记南京大屠杀这惨绝人寰....的灾难,记住中华民族这一奇耻大辱。

B.壶口瀑布轰隆的巨响,振聋发聩....,游客打着手势在大声地交谈,却好像失去了声音。

C.与广袤的宇宙相比,人类只是沧海桑田....,极其渺小,只有遵循规律,才能实现“天人”的和谐。

D.在上期的娱乐节目中,各位嘉宾正襟危坐....,非常投入地参加活动,录制工作顺利结束。

5.下列句子中没有语病....的一项是( ) (2分)A.成都市申办2025年世运会,无疑不是成都积极创建世界赛事名城的重要举措之一。

B.市教育局推动的“研学旅行”项目,在丰富学生见闻的同时提升了学生的人文素养。

C.因为搭上了网络购物的顺风车,快递行业迸发出极大的生长活力让人瞠目结舌。

八年级月考试题及答案

八年级月考试题及答案

八年级月考试题及答案一、选择题(每题2分,共20分)1. 下列哪个选项是正确的?A. 地球是太阳系中最大的行星B. 地球是太阳系中唯一有液态水的行星C. 地球是太阳系中最小的行星D. 地球是太阳系中唯一有生命的行星答案:B2. 以下哪个是光合作用的产物?A. 水B. 氧气C. 二氧化碳D. 甲烷答案:B3. 以下哪个是化学变化?A. 水的沸腾B. 铁的生锈C. 水的蒸发D. 冰的融化答案:B4. 以下哪个是物理变化?A. 木材燃烧B. 铁的生锈C. 木材雕刻D. 铁的氧化答案:C5. 下列哪个是正确的力的定义?A. 力是物体运动的原因B. 力是物体运动的结果C. 力是物体运动的阻碍D. 力是物体运动的维持答案:A6. 以下哪个是正确的能量转换?A. 电能转换为热能B. 热能转换为电能C. 热能转换为光能D. 光能转换为热能答案:A7. 下列哪个是正确的速度计算公式?A. v = s/tB. v = t/sC. s = v*tD. s = t/v答案:A8. 以下哪个是正确的密度定义?A. 密度 = 质量 / 体积B. 密度 = 体积 / 质量C. 密度 = 质量 * 体积D. 密度 = 体积 * 质量答案:A9. 以下哪个是正确的光的传播方式?A. 光只能直线传播B. 光只能曲线传播C. 光可以直线和曲线传播D. 光只能反射传播答案:A10. 以下哪个是正确的电流定义?A. 电流 = 电压 / 电阻B. 电流 = 电压 * 电阻C. 电流 = 电阻 / 电压D. 电流 = 电压 + 电阻答案:B二、填空题(每题2分,共20分)1. 牛顿第一定律也被称为______定律。

答案:惯性2. 光年是光在一年内通过的距离,其单位是______。

答案:长度3. 物质的三态包括固态、液态和______。

答案:气态4. 化学方程式中,反应物和生成物的总质量______。

答案:相等5. 电流的单位是______。

毕节市八年级下学期第二次月考语文试题

毕节市八年级下学期第二次月考语文试题

毕节市八年级下学期第二次月考语文试题姓名:________ 班级:________ 成绩:________一、选择题 (共3题;共6分)1. (2分) (2017八上·扬州月考) 下列句子中,划线成语使用正确的一项是()A . 这张照片的左边是一位英俊的警察,右边是一位文弱的莘莘学子。

B . “4·18”扬州烟花三月旅游节期间,滔滔不绝的旅游人群使扬州各风景区水泄不通。

C . 专家提醒说,气温骤降可能会加剧某些病毒的传播速度,希望大家不要掉以轻心。

D . 作文课上,老师批评我的作文语句不通,而且文不划线,令人费解。

2. (2分)(2019·越秀模拟) 把下列句子组合成语序合理、语义连贯的一段话,最恰当的一项是()①文化自信,是更基础、更广泛、更深厚的自信,是更基本、更深沉、更持久的力量。

②没有文化自信,不可能写出有骨气、有个性、有神采的作品。

③坚定文化自信,是事关国运兴衰、事关文化安全、事关民族精神独立性的大问题。

④历史和现实都表明,一个抛弃了或者背叛了自己历史文化的民族,不仅不可能发展起来,而且很可能上演一幕幕历史悲剧。

⑤文化是一个国家、一个民族的灵魂。

A . ①③④②⑤B . ⑤④①③②C . ⑤③②④①D . ①⑤③②④3. (2分) (2016八上·宿州期中) 选出没有语病的一项()A . 学习委员猜测,新来的语文老师大概是二十三四岁左右。

B . 是否多读书,也是提高一个人语文素养的途径之一。

C . 中学生是学习的重要阶段。

D . 我们要注意找出并改正作文中的错别字。

二、书写 (共1题;共6分)4. (6分) (2019七上·兰溪月考) 阅读下面文段,根据语境完成后面的题目。

傍晚时候,上灯了,一点点黄晕的光,(hōng)托出一片安静而和平的夜。

在乡下,小路上,石桥边,有撑起伞慢慢走着的人,地里还有工作的农民,披着蓑戴着笠。

(选自《春》)也许,到冬天来临,人们会讨厌雨吧!但这时候,雨已经化________了,它经常变成美丽的雪花,飘然(lì)临人间。

最新人教版八年级生物上册第二次月考试题及参考答案

最新人教版八年级生物上册第二次月考试题及参考答案

最新人教版八年级生物上册第二次月考试题及参考答案人教版八年级生物上册第二次月考试题一、单项选择题(每小题2分,共50分)1. 水螅和涡虫消化食物的场所分别是()A. 肠、消化腔B. 口、消化腔C. 消化腔、消化腔D. 消化腔、肠2.大雨过后蚯蚓常常会爬出地面,这主要是因为()A. 到地面寻找食物B. 要见阳光C. 土壤中氧气缺乏D. 土壤中温度太低3. 爬行动物与两栖动物相比,其进化意义是()A. 真正适应陆地环境的生活B. 个体的身体高大C. 既能生活在水中,也能生活在陆地D. 种类多,种群大4. 下列叙述中,属于鱼类、两栖类、爬行类等动物共同特征的是()A. 用肺呼吸B. 体外受精C. 体温不稳定D. 能在水中和陆地上生活5.下列行为属于鸟类繁殖过程中必不可少的是()①交配②筑巢③育雏④孵卵⑤产卵⑥求偶A. ①②③B. ②③④C. ④⑤⑥D. ①⑤⑥6.各种动物都以各自独特的方式适应环境,下列选项中错误的是()A. 军马——牙齿有分化,提高了摄取食物和对食物的消化能力B. 蜥蜴——体表有角质的鳞片,可以减少体内水分的蒸发C. 鲨鱼——身体呈流线型,可减少游泳时的阻力D. 家鸽——每呼吸一次,要在肺和气囊中各进行一次气体交换7. 哺乳动物与鸟类的共同特征是()A. 两者都有羽毛B. 两者都是恒温动物C. 两者都是胎生D. 两者都有翅膀8.绦虫和蛔虫均为肠道寄生虫;蝗虫对禾本科作物危害很大;青蛙被称为田园卫士。

绦虫、蛔虫、蝗虫、青蛙它们分别属于()A. 腔肠动物、扁形动物、环节动物、爬行动物B. 扁形动物、线形动物、节肢动物、两栖动物C. 线形动物、线形动物、环节动物、两栖动物D. 扁形动物、环节动物、节肢动物、两栖动物9.下列属于先天性行为的是大()A. 大雁南飞、惊弓之鸟B. 狗辨主客、鹦鹉学舌C. 蜘蛛结网、孔雀开屏D. 黄牛耕地、老马识途10.下列各项中,不属于动物社会行为的是()A. 麝香牛为保护幼牛共同阻挡狼的袭击B. 工蜂喂养蜂王C. 牧羊人放羊时,头羊走在前面D. 草原上生活着大量蝗虫11.大量的细菌能使食物腐烂,食品在冰箱中能保存一定时间不腐烂,主要原因是冰箱环境中()A. 细菌很少B. 细菌繁殖很慢C. 没有细菌D. 细菌都冻死了12.真菌和细菌生活必需的基本条件是()A. 水分、适宜的温度、有机物B. 水分、较高的温度、充足的食物C. 水分、适宜的温度、无机物D. 水分、适宜的温度、充足的氧气13.疾病防治经常利用到细菌、真菌,如科学家把其他生物的某种基因转入一些细菌内部,使这些细菌能够生产药物,例如:大肠杆菌能生产胰岛素。

八年级第二学期英语第二次月考试题(6—8单元)(1)

八年级第二学期英语第二次月考试题(6—8单元)(1)

八年级第二学期英语第二次月考试题(6—8单元)班级__________ 姓名___________ 学号__________Ⅰ. 单项选择(20分)1. ---- ______have you been living here? ------ I have been living here for 20 years.A. How longB. How oftenC. How muchD. How soon2. She has been swimming _______.A. for three and a half hoursB. since three hours and a halfC. three and a half hours agoD. three hours and a half before3. My hobby is _______ old coins.A. collectingB. collectsC. collecttingD. collected4. We have been studying in the school ______.A. since two yearsB. for two years agoC. since two years agoD. after two years5. _______ was amazed at the news.A. The all classB. The whole classC. All the boysD. Whole the class6. If you lose the book, you must _______ money for it.A. payB. takeC. costD. spend7. Would you mind ______ this pair of jeans.A. don’t wearB. not wearingC. not to wearD. doesn’t wear8. My father got ______ when he heard I couldn’t pass the exam.A. annoyB. annoyedC. annoysD. annoying9. ----- Would you mind giving me another one? ------ _____.A. No, not at allB. Yes, I wouldC. Yes, not at allD. No, I would10. The woman in Brown _______ Mary’s mother, ______ she was talking about Mary with the teacher.A. maybe; may beB. maybe; maybeC. may be; maybeD. may be; may be11. Don’t forget to call me up at once if she ______ to visit you tomorrow.A. comesB. will comeC. is comingD. come12. He tries to learn English _____ different ways.A. onB. atC. inD. for13. ----- Will you please ______ us about your country? ----- Certainly.A. tellB. to tellC. tellingD. tells14. ----- My house is very near a busy street. ----- It ______ be very quiet.A. canB. mustC. can’tD. mustn’t15 ---- Would you please ______ the TV a little? Jack is doing his homework. ----- Terribly sorry. I will.A. turn downB. turn upC. turn onD. turn off16. His parents often encourage him ______ hard.A. workB. workingC. to workD. works17. ---- What about getting her some flowers? ----- That’s good, but they’er not _______.A. enough specialB. special enoughC. too specialD. more special.18. I like playing basketball. My brother likes playing soccer _________.A. tooB. insteadC. instead ofD. but19. It’s helpful to give children enough love______ give them much money.A. rather thanB. rather thenC. ratherD. but 20. I didn’t buy that nice skirt yesterday. It’s a little big for me, _______, it’s too expensive.A. exceptB. besidesC. beside expectⅡ. 用所给的词的适当形式填空(10分)1.He is always the last one ____________ (leave) the classroom every day.2.The boy became ___________ (interest) in playing chess.3.Try ___________ (not make) a noise, or you will make her up.4.Does anyone have a ____________ (suggest) about the pet?5.When the teacher came in, the students stopped __________ (talk).6.Mum won’t allow me __________ (go) boating before I finish my homework.7.What should we _______ (do) to help you?8.We all know that cats like eating ________ (mouse).9.She was too busy ___________ (have) a rest.10.Do you know that girl _________ (call) Emma.Ⅲ. 根据句意及所给首字母或汉语提示写单词(10分)1.Tell those __________ (小孩) not to play with fire.2.She has a ___________ (九岁的)son.3.Many people love the little boy, because he is a ____________ (有礼貌的) boy.4.I want to ___________ (挑选) a special gift for my little sister.5.Our class is organizing a talent show to r_________ money for charity.6.She gave me a p__________ on my birthday.7.Beijing is the c_________ of China.8.I’ll wash my hands r________ away.9.Lu Xun is a great w__________ in China.10.China is an A__________ country.Ⅳ.从方框中选择最佳选项完成对话,有两项多余。

湖北省黄冈市红安县实验中学八年级下学期第二次月考语文考试卷(初二)月考考试卷.doc

湖北省黄冈市红安县实验中学八年级下学期第二次月考语文考试卷(初二)月考考试卷.doc

湖北省黄冈市红安县实验中学八年级下学期第二次月考语文考试卷(初二)月考考试卷姓名:_____________ 年级:____________ 学号:______________一、xx 题 (每空xx 分,共xx 分) 【题文】____________________,病树前头万木春。

(刘禹锡《酬乐天扬州初逢席上见赠》)。

【答案】沉舟侧畔千帆过【解析】这是传统的记忆型默写题。

要求学生直接默写出指定的文句,这类题目要求考生日常加强背诵识记,尤其是不仅能背诵,还要能默写。

“畔”是易错字,作答时要注意。

【题文】____________________,松柏有本性。

(刘祯《赠从弟》)。

【答案】岂不罹凝寒【解析】这是传统的记忆型默写题。

要求学生直接默写出指定的文句,这类题目要求考生日常加强背诵识记,尤其是不仅能背诵,还要能默写。

此题中要注意“罹”字的正确书写,关键字不要出错。

同时注意字体结构较复杂的字要书写匀称,保持字体的美观大方。

【题文】行到水穷处,____________________。

【答案】坐看云起时【解析】这是传统的记忆型默写题。

要求学生直接默写出指定的文句,这类题目要求考生日常加强背诵识记,尤其是不仅能背诵,还要能默写。

此题诗句较为熟悉,且没有易错字,只要平时背诵过,就不会丢分,难度较小,上下句联系较为紧密,一般都能掌握。

【题文】在李白的《宣州谢朓楼饯别校书叔云》一诗中,叙写了诗人满腹苦闷愁绪的诗句是_______________,___________。

【答案】 抽刀断水水更流 举杯销愁愁更愁【解析】此题考查考生对古诗文的记忆能力、理解能力。

解题时一是要透彻理解诗歌的内容,二是要认真审题,找出合适的诗句,三是答题时不能写错别字。

平时要注意名篇中名句的归纳整理,注意表达的思想感情各有不同,根据感情色彩做不同的分类整理。

【题文】杜牧的《赤壁》中蕴含机遇造人的哲理,且隐含着诗人对自己生不逢时、怀才不遇的慨叹之情的句子是“_________________,________________。

安徽省滁州市定远县第三初级中学2022-2023学年八年级下学期第二次月考语文试题(原卷版)

安徽省滁州市定远县第三初级中学2022-2023学年八年级下学期第二次月考语文试题(原卷版)
7.某日报设有“游山玩水”“烟火乡味”“乡村振兴”等栏目。你会向哪个栏目推荐本文?请说明理由。
阅读下面的文字,完成下面小题。
土壤的前世今生
郭俊刚 赵恒勤
①你可知道,田野里松软芬芳的泥土来自坚硬巨大的岩石?几十亿年间,神奇的大自然让坚硬的岩石悄然变成了肥沃的土壤。
②早在几十亿年前,地壳表面裸露的岩石受到风力和水力的侵蚀,在物理、化学、生物等多种因素的综合作用下,逐渐破碎和分解。大块的岩石变成了小块,小块又变成了细粒。在岩石由大变小、由粗变细的过程中,形成了一种叫“成土母质”的物质,这个过程叫作“风化”。要注意的是,成土母质还不是土壤。时间又过了数亿年,成土母质在水、空气、腐殖质和微生物的帮助下,逐步形成真正的土壤。在自然界,需要300年到1000年的时间才能形成大约2.5厘米厚的土壤。
B.第②段加点词“大约”表示“2.5厘米”只是估计而得,体现了说明语言的准确性。
C.人类对土地资源造成的伤害随着人类认识和改造大自然的本领不断地增强而增大。
D.土壤中的重金属超标则会影响植物的正常生长,有的会通过食物链影响人体健康。
9.文章的标题运用了哪种修辞手法?“前世”和“今生”分别指什么内容?
一、默写(本大题共1小题,共10分)
1.根据课文默写古诗文。
(1)晓雾将歇,______。(陶弘景《答谢中书书______,______,盖竹柏影也(苏轼《记承天寺夜游》)
(4)春天万物复苏,绿草悠悠,百花齐放,我们可以引用白居易《钱塘湖春行》中的句子“______,______”来描述这种花草美景。
④随着“绿水青山就是金山银山”理念的深入人心,人们越来越强烈地意识到必须采取一定的措施,将矿产资源开发利用对土壤环境造成的损害降到最低:通过矿山土地复垦,增加可耕地数量,提高土地质量,改善生态环境;通过开采工艺的改进,充分利用采空区和废弃巷道,减少地表塌陷和废石排放;通过生产设备和生产工艺的改进和优化,实现对矿产资源的高效节约集约利用,减少废弃物排放。

人教版八年级第二次月考数学试题

人教版八年级第二次月考数学试题

人教版八年级第二次月考数学试题姓名:________ 班级:________ 成绩:________一、单选题1 . 已知,,则经过A,B两点的直线对应的函数表达式为()A.B.C.D.2 . 在平面直角坐标系中,点P关于y轴的对称点为P1(-2,6),则点P的坐标为()A.(-2、-6)B.(2、6)C.(2、-6)D.(6、-2)3 . 如图是沈阳市地图简图的一部分,6古楼大北门7故宫8大南门东华门图中“故宫”、“古楼”所在的区域分别是()A.,B.,C.,D.,4 . 如图是一次函数y1=kx+b与y2=x+a的图象,则下列结论:①k<0;②a>0;③b>0:④方程kx+b=x+a的解是x=3,错误的个数是()A.1个B.2个C.3个D.4个5 . 小慧去花店购买鲜花,若买5支玫瑰和3支百合,则她所带的钱还剩下10元;若买3支玫瑰和5支百合,则她所带的钱还缺4元.若只买8支玫瑰,则她所带的钱还剩下()A.31元B.30元C.25元D.19元6 . 食堂的存煤计划用若干天,若每天用130kg,则缺少60kg;若每天用120kg,则还剩余60kg.设食堂的存煤共有xkg,计划用y天,则下面所列方程组正确的是()A.B.C.D.7 . 正比例函数的图象在第二、四象限,则一次函数的图象大致是()A.B.C.D.8 . 下列关系式中,y是x的一次函数的是()B.C.D.A.9 . 在平面直角坐标系中,已知点,,将线段绕点旋转后,得到线段,则线段所在直线的函数解析式是()A.y=3x+15B.y=3x-15C.y=15x-3D.y=-15x+310 . 若是方程3x+my=1的一个解,则m的值是()A.1B.﹣1C.2D.﹣2二、填空题11 . 无论m为何值,点A(m,5-2m)不可能在第________象限.12 . 已知直线y=(4-3m)x+m-4与直线y=x+6平行,求此直线的解析式__________.13 . 若直线y=kx+b与直线y=2x平行,且与y轴相交于点(0,﹣3),则直线的函数表达式是_________.14 . 《孙子算经》中有一道题:“今有木,不知长短,引绳度之,余绳四尺五寸;屈绳量之,不足一尺,木长几何?”译文大致是:“用一根绳子去量一根木条,绳子剩余尺;将绳子对折再量木条,木条剩余尺,问木条长多少尺?”如果设木条长尺,绳子长尺,可列方程组为___________;15 . 已知点P(x,y)在第一象限,它的坐标满足方程组,则m的取值范围为__________.16 . 直线l1:y=kx+b与直线l2:y=-3x在同一平面直角坐标系内的图象如图所示,则关于x,y的方程组的解为____.17 . 一次函数y1=kx+b与y2=x+a的图象如图,则下列结论:①k<0;②a>0;③关于x的方程kx﹣x=a﹣b的解是x=3;④当x>3时,y1<y2中.则正确的序号有____________.三、解答题18 . 星期天,小明从家里出发到图书馆去看书,再回到家.他离家的距离y(千米)与时间t(分钟)的关系如图所示.根据图像回答下列问题:(1)小明家离图书馆的距离是________千米;(2)小明在图书馆看书的时间为________小时;(3)小明去图书馆时的速度是________千米/小时.19 . 古代算题:“今有牛五、羊二,值金十两;牛二、羊五,值金八两.牛羊各值金几何”请你读懂题意,给予解答.20 . 先化简,再求值:(),其中x、y分别是一次函数y x+1的图象与x轴交点的横坐标和与y轴交点的纵坐标.21 . 已知△ABC与△DEF关于y轴对称,点A, B, C的对称点分别是D, E,A.(1)在图中画出△DEF;(2)写出点D, E, F的坐标;(3)在y轴上有一点P,且PB+PC的值最小,画出点P,并保留作图痕迹.22 . (1)(2)解方程组:(3)解不等式组,并将解集表示到数轴上23 . (1)计算:;(2)化简:.24 . 某市遭遇严重水灾.有关部门紧急部署,组织了一批救灾帐篷和食品准备送往灾区.已知帐篷和食品共680件,且帐篷比食品多200件.(1)求帐篷和食品各多少件?(2)现计划用A、B两种货车共16辆,一次性将物资送往灾区,已知A种货车可装帐篷40件和食品10件,B 种货车可装帐篷20件和食品20件,请设计一下共几种运输方案?(3)在(2)的条件下,A种货车每辆运费800元,B种货车每辆运费720元,怎样安排调运方案才能使总运费最少?最少运费是多少?25 . 对于平面直角坐标系中的点和图形,给出如下定义:若在图形上存在两个点,使得以为顶点的三角形为等边三角形,则称为图形的“等边依附点”.(1)已知,.①在点,,中,是线段的“等边依附点”的是_______;②点在轴上运动,若为线段的“等边依附点”,求点的横坐标的取值范围;(2)已知的半径为1,若上所有点都是某条线段的“等边依附点”,直接写出这条线段长的取值范围.参考答案一、单选题1、2、3、4、5、6、7、8、9、10、二、填空题1、2、3、4、5、6、7、三、解答题1、2、3、4、5、6、7、8、。

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大明中学八年级上英语第二月考题命题人:纪定权总分(120分)班级姓名学号得分一、单项选择(15分)( )1.—______ is “Lucky 52”shown on CCTV-2? —Every weekA.How longB. How oftenC. How many timesD. How soon ( ) 2.—How was the weather yesterday ?—It was terrible. It rained ____. People could ____go out .A.hardly; hardlyB. hard; hardC.hard; hardlyD. hardly; hard( ) 3. —____ do you exercise? —Four times a weekA.How much .B. How ofenC. How longD. How many( ) 4. You are so busy .What do you want me____for you?A.doB.doneC.to doD. doing( ) 5. Alice was ill, so her mother____her at home.A.took afterB.looked forC. looked afterD. took care( ) 6.You ____be quiet when you are in the reading room.A.shouldB.shouldn’tC. canD. can’t( ) 7. —Mom, ____I play computer games?—Yes, you can.But you have to finish your homework first.A.mustB.mayC.willD. need( ) 8. —Who is the girl standing over there?—Well ,if you ____ know, her name is Joe.A. mustB. may C .Can D.shall( )9.The __ now is that we have lots of to ask.A. problem, questionB. question, problemsC. question, problemD. problem, questions( )10.He speaks very good English but he knows ____English people .A. fewB. little C a few D a little( )11. —Why don't you go to the shop on foot? —It takes me _____ time.A much tooB too muchC very muchD too many( )12.What _____ your father do on Sunday?A. doB. doesC. isD. will( )13.She usually goes ______ in the evening?A. to skateboardB. skateboardingC. skateboardD. skateboards ( )14. He wants me _____ to Shanghai with him tomorrow.A. goB. goingC. to goD. to going( )15.I eat fruit and drink milk every day to keep me_ _.A. healthB. healthilyC. healthyD. unhealthy二、完形填空:(20分)ASome people eat to live , but some people __ 16___ to eat. To live a long andhealthy life, we must learn to __17__ a balanced diet and everyone should have one.Some people believe that “you are what you __18__‖. Better food habits can helppeople be away from __19__. A good __20__plan is to choose the right foods to eat,and cook them in a healthy ___21 t what are healthy __22__? In a well-balanceddiet, there should be milk__., cheese , some chicken and fish. Fruit and vegetablesare also good ___23__ our health, because they have __24___ fat. If your diet isvery healthy, remember to do some __25___ after meals.( ) 16. A. live B. like C. want D. help( ) 17. A. drink B. have C. do D. buy( ) 18. A. get B. make C. do D. eat( ) 19. A. health B. happiness C. worry D. illness( ) 20. A. eating B. playing C. cooking D. drinking( ) 21. A. plate B. restaurant C. shop D. way( )22. A. fruits B. foods C. drinks D. vegetables( ) 23. A. as B. for C. with D. at( ) 24. A. a little B. few C. little D. a few( ) 25. A. habits B. meals C. exercise D. workBFood is very important. Everyone needs to _ 26 _ well if he or she wantsto have a strong body. Our brains (大脑) also need a kind of food. This kind of foodis __27___. We begin to get knowledge (知识) When we are very young. Smallchildren are interested in everything around them. They learn __28__ while (当)they are watching and _ 29 _.When they are getting older, they begin to___30__ storybooks, anything they like. When they find something new, they liketo ask questions and __31___to find out the answer.What is the best ___32 __ to get knowledge? If we __33___ by ourselves,we’ll get the most knowledge. If we’re __34___ getting answers from others and donot ask why, we will never learn well. When we study in a right way, we will learn___35__ and understand (理解) better.( ) 26. A. read B. see C. drink D. eat( ) 27. A. knowledge B. sport C. playing D. fruit( ) 28. A. everything B. something C. nothing D. anything( ) 29. A. finding B. listening to C. listening D. looking at( ) 30. A. learn B. buy C. write D. read( ) 31. A. try B. have C. like D. should( ) 32. A place B. school C. way D. road( ) 33. A. work B. learn C. help D. do( ) 34. A. often B. always C. usually D. sometimes( ) 35. A. more B. much C. little D. some三、阅读理解(40分)AOne day, Jack comes to Mike’s house and says, “Mike, you have so manygood books. Can you lend me a book to read?”Mike doesn’t want to lend a bookto his friend, and he says, “Why do you want to take my book home: You can readit here in my house.‖ Jack sees that his friend is very selfish, but he say nothing.Next day, Mike comes to Jack’s house and says, ―Jack, you have a goodgarden-knife. I want to work in my garden tomorrow. Can I use it for two days?‖Jack answers, ― Why do you want to take my garden-knife home? You can workwith it in my garden.‖( ) 36.Jack comes to Mike’s home because he wants ________.A. just to see MikeB. to lend Mike a bookC. to borrow a book from MikeD. to go to the library with Mike( )37.What does Jack think of Mike? ______.A. He thinks him a good friendB.He thinks him a good boyC. He thinks him kindD. He doesn’t thinks him kind( )38.Why does Mike borrow Jac k’s garden-knife the next day? _________.A. He wants to work in his garden that afternoon.B. He wants to work in Jack’s gardenC. He doesn’t say whyD. He wants to lend Jack his book( )39. Will Jack lend his garden –knife to mike? ________A. Yes, he willB. No, he w on’tC. Yes , doesn’tD. No, he does( )40. What do you learn from this passage? __________A. We should always be nice to our friendsB. We shouldn’t be nice to our friends if they are not nice to us.C. We should be selfish.D. We should not like them if our friends are not kind to us.BMr. Black works in an office. He’s very busy and he has no time to rest. Everyevening, When he comes back from his office, he always feels tired and wants to goto bed early, but his wife often has something interesting to tell him after supper.She keeps talking until it’s too late. But Mr Black has to get up early in themorning.One day Mr Black felt terrible and couldn’t go to work. He went to see adoctor with Mrs Black. Before he said what the matter was him, his wife told thedoctor all. The doctor got the reason and said to Mrs Black, “Here is a bottle ofmedicine for your husband and some pills for you.”“For me?”the woman said in surprise, “I’m fine. I don’t need any medicine!”“I don’t think, madam,”said the doctor, “They’re sleeping pills(安眠药) ). Yourhusband will soon be all right if you take them!”( )41. How does Mr Black usually feel when he gets back home?A. WorriedB. HappyC. AngryD. Tired( )42. What does Mrs Black usually do after supper?1A. She goes to bed earlyB. She watches TV.C. She keeps talking with her husband.D. She does housework.( )43. What did Mr Black do when he was ill?A. He stayed in bed.B. He asked his wife for help.C. He called the doctorD. He went to the hospital with his wife ( )44. The doctor gave Mrs Black some medicine _________.A. to make her happyB. to let her sleep quicklyC. to make her get betterD. to make her feel busy( )45. The doctor wanted to make Mr Black feel better by ______.A. curing(治疗) ) Mrs Black firstB. giving him a bottleC. telling him to stay at homeD. asking him to do exerciseCWe all need to exercise. Doctors say it is good for us. It makes your heart and body strong. It also gives you more energy. And you will feel better about yourself. It's best to exercise twice a week. Twenty minutes each time is enough.There are many ways to exercise. You can walk, run, play sports, or swim. Many people go to special places to exercise.They are ca1led "fitness centers." These places have a lot of equipment(器材). Some People buy equipment for their homes. But it is very expensive.Exercising can be fun. Friends can exercise together at a fitness center. Or, they can play sports together. How do you exercise ?( )46. What is the main idea?A. Exercise equipment is expensive.B. Playing sports is a good way to exercise.C. Every person shou1d exercise.( )47. We should exercise ________.A. every dayB. 20 minutes a weekC. twice a week( )48. At fitness centers,________.A. you can buy expensive equipmentB. people can do many kinds of exercisingC. it is very expensive( )49. Which of these kinds of exercising is not in the article?A. Dancing.B. Swimming.C. Sports.( )50. Which of these sentences about exercising is true?A. Exercising is expensive.B. Exercise is good for your heart.C. Only doctors exercise.DEarly to bed,early to rise makes man healthy,wealthy and wise.This is an old English saying(谚语). Have you heard of it before? It means that we must go to bed early at night and get up early in the morning. Then we shall be healthy. We shall also be rich(wealthy)and clever(wise).This is true. The body must have enough sleep to be healthy. Children of young age should have ten hours’sleep every night. Children who do not haveenough sleep cannot do their work very well. They will not be wise and they maynot become wealthy!The body also needs exercise. Walking,running,jumping,swimming andplaying games are all exercise. Exercise keeps the body strong.Exercise also helps the blood(血液)to move around inside the body. This isvery important. Our blood takes food to all parts of our body. The head also needsblood. Exercise helps us to think better!( )51. If we get up early and go to bed early,we’ll ________.A. have enough exerciseB. be healthyC. think betterD. have strong blood( )52. If a chill doesn’t have 10 hours’ sleep,maybe he or she ________.A. will become wiseB. won’t do well in his workC. will go to school in timeD. will have enough sleep( )53. A person needs exercise because ________.A. it makes him healthyB. he or she has a lot of homework to doC. he or she is strong enoughD. he or she does exercise( )54. Exercise makes the ________ move quickly and smoothly(流畅地).A. bodyB. bloodC. childrenD. head( )55. Keeping taking exercise every day can make our body ________.A. sleepyB. tiredC. strongD. weak四、选择方框中的单词,并用其适当形式填空。

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